Carbureter.



F. H. HBITGER.

CARBUBBTBR.

APPLIATIQON' FILED SBPT.29,1910.

` Patented Feb. 11, 1913.

INVENTOR. Fvcm K n Hefq' e?.

2 SHEETS-SHEET 2.

WITNESSES:

A TTORNEY.

.float FRANK H. HEITGER, OF INDIANAPOLIS, INDIANA.

CAIn/BURETER.

Specification of Letters Patent.

rarement ren. ii, iota.

Application filed September 29. 1910. Serial No. 584,413.

To all idiom 'it may concern Be it known that l, FRANK H. Hnrrunu, of Indianapolis, county oi. Marion, and. State of Indiana, hare invented a certain uset'ul :Garbureterg and l do hereby declare that the following is a tull, clear, and exact description thereof, reference being` had to the aeconipanying drawings.

The object of this invention is to provide an iniprovedmeans for i'c,9,'ulatin, the fuel valve and particularly with reference to the operation of the carburetor, and inore particularly to provide independent means for adjusting the fuel valve when the throttle is at its two cxtreme posititnis.

The nature et' the invention will be understood from the accompanying drawings and the following description and claims.

1n the drawings Figure 1 is a side elevation of the carbureter. Fig. 2 is a central vertical section therethrough. Fig. 5l is a plan View thereof with the throttle. lever and associated parts in one position. Fig. 1 is a section on the line t-tot ,l`ig. 3. Fig. 5 is plan View with the throttle lever shown l i a dilierent position. troni what it is in Fig. 3. (3 is a. section on the line (il-t3 of Fig. Fig. a section on the line 7 7 ot Fig. 1 with port-ions oniitted and portions shown` in perspective.

inasmuch as the invention relates to only a portion ot the device as a whole, only that portion ot thc device to which the invention relates will be described herein, as the remaining igiortions will be understood by thoseI skilled in the art troni the drawing, and such remaining portions can be modified or const ructed in any desired nianner.

rThere a bowl 10 for the gasolcne, which overflows into it past the needle valve l1 from a suitable supply through the tube 12. A. float 133 controls the needle Valve. lhere is a top for the float chaniber and a tube 16 extends downwardly thcretroni into close proximity with the lower, part of the bowl, and is located centrally of the bowl and a shoulder 116 which rests upon suitable packing on,the inside ot the bowl 10 and the extremo lower end 1S of said tube projects through said bowl into the horizontally disposed air inlet tunnel 19.' The arms ot the inverted T connection 23 extend across the tube 1G near the lower part oi the bowl 1Q with screens'or strainers 17 covering the entrances and a fuel nozzle 2-1 is screwed into Near its lower end the tube 1 6 has the other branch of the T within the tube 16 and extends upward therefrom as hereafter described. There is a' downward extension 21 from the lower side of the T 23 which extends centrally through the lower end 1S of the tube 1G and through the reduced end of the air funnel 19. Said funnel is clamped against the underside of the bowl l0 by a nut in the threaded lower end of the eX- tcnsion 21. The T connection 23 extends through the tube 1.6, but does not entirely close the passage therethrough, so that there is ainple assageway for air up through the cylinder 1S and for air and gasolene up through the lower-part of the tube 16, so that Vthe tube 1G iornxs a passageway for combined air and fuel. The fuel nozzle 241 which screws into the lower part ot the tube 16 is central thereof and the outlet therefrom is controlled by a needle valve 25 which extends up centrally through the tube 16 and through the mixing chamber 27 and beyond the top ot the device, and near its upper end it is tl'n'eadcd at 28 and screws int-o an oscillatory segmental plate 29 and the needle Valve has a knurled head 30 on the upper end. lt. pressed downwardly by the spring 31 lying coiled around the needle valve within the mixing chamber, the upper end of the spring bearing against the upper wall of the mixing chamber and the lower end bearingr againstthe pin 32, which depresses the needle valve.

The teeth on the segmental plate 29 mesh with the teeth on the segmental plate 341-, which is secured to the throttle shaft 35 which extends vertically through the upper part of the deyic-l and on its lower end carries a throttle valve 3G for regulating the outlet opening 3T to the i'uel Chamber of the cylinder. 3S is the throttle lever secured on the shalt Hence when the throttle valve is operated, the segn'iental plate 29, which carries the needle valre 25, is oscillated, and as it, is oscillated it clevates or lowers the needle Valve because said segmental plate 29 carries an arm 40, which has a Vertical wheel L11 on the pin 42, and said wheelV travels on a curved plate 413, Vhich is substantially horizontal. rlhis plan-e is secured at one end to the top ot the device by the screw 114, ai d at the other end, which is free, it bears on a ball 115, see Figs. and 5, lying in a ball recess 46, and the ballis .elke- Vated and lowered by the pointed end et a screw A17 which has a lmurled head 18 on it.

lzo

`is controlled immediately and directly by A spring-pressed pin 49 engages the periphery of-tbe knurledhead 4" and holds it in any position it is set. There is a second air inlet 50 lwhich-`is closed by the valve 51, which is spring-pressed by `the spring 52. This air inlet is on one side of the mixing chamber 27 and opposite the gas outlet to the linder.

The screw 47 is set so as to lift the ball 45 and push the free end of the plate 43 so as to make that plate inclined, as shown in Figs. 4 and 5. The plate Ais concentric with the stem of the needlefyalve, so that the Wheel 4l will travel on't-.as the segmental plate 29 is oscillated by the throttle shaft.. Therefore, when thethrottle lever and other parts are in the lposit-ion shown in Figs. 3 and 4, the Iylieed'lel valve 25 will be at the lowest l'iifiiitfo'f movement at which it has been set,y and the'throttle valve will be practical1yj;'f"closed. the throttle valve is openedjgraduallyby operation of the throttle leVerBB, vthe segmental plate 29 will .be turnedlsand'the wheel 41 will travel over the plate 43, which isincl.ined,5and that4 will of the needle valve so as to cause y.more gasolene or fuel to pass from the float chamber to the mixing chamber. In other words, with this arrangement the quantity of fuel the throttle lever so as to be in proportion to the opening through the outlet to the cylinder, and, therefore, in a sense in proportion to the demand forl fuel. The extent of this opening movement of the needle valve is pre-determined bythe adjustment ofthe screw 47 and for that pur ose the knurled head 48 is numbered as si'own in Fig. l, so that thel operator can see how to turn it in order to increase the supply of fuel by operation of the throttle lever. The needle valve is also 'primarily adjusted by turning the knurled head 30 on the stem thereof so as to vcause theneedle valve to seat and close when the throttle is closed, or to adjust the extentof opening through the nozzle 24 as may be desired. To that end the knurled head 30 is likewise numbered, as shown in Figs. 3 and 5, to indicate to the operator the adjustment made.

` rlhe segmental plate 29 and the segmental arm 34 are limited in their movements by the end teeth 60 on the segmental plate 29v having flat endsl adapted to abut against llat stop surfaces 61 at the end of each. row of teeth on the segmental arm 34.

It is observed that the segmental plate 20 is normally locked `into engagement with the stem of the needlel valve byv the spring-pressed end (34 in the upper portion of the arm 40 on the plate .29 engaging the knurled head 30, so that normally the plate 29 and stem of the valve will turn together, and yet they may be adjusted relaktively to each 'other when desired. The ele vation of the needle valve is accomplished,

therefore, Wholly by the inclination ofthe down to close the valve, a knurled head on the upper end of thevalve stem, a segmental plate which screws on the threaded-portion of the valve'stem above the casing, said plate being provided with an upwardly eX- tending portion, a spring-pressed pin in .said upwardly extending portion which engages said knurled head and normall looks the two together, a roller mounted in connection with said segmental plate, a plate mounted .on the casing and connected thereto at one ,end and tree at the othervend and over which said roller is adapted to move, a screw entering said casing and adapted to cause the-elevation of the free end of said plate for inclining the Same, a throttle valve,

an operating lever therefor and means connected with the throttle valve and lever'for oscillating said segmental plate and arranged so that said segmental plate will travel up on said inclined plate ass-aid throttle valve goes to an open position. j

2. A carbureter including a casing, a needle valve and 'stem vertlcally mounted therein so as to be oscillatable, the upper portion of the valve stem being threaded, a spring tending to force said valve stem down to elosevthe valve, a knurled head on the upper end of the valve stem, a segmental plate which screws on the threaded portion of the valve stem vabove the casing, said plate being provided with an upwardly extending portion, a spring-pressed pin in said upwardly extending portion which engages said knurled head and normally loelcs the two together, a roller mounted in connection with said segmental plate, a plate mounted en the casing and connected thereto at one end and free at the other end and over which said roller is adapted to move, a screw entering said casing and adapted to cause the elevation of the free end of said plate for inclining the same, a throttle valve, a throttle valve shaft, a throttle valve lever, and a segmental arm lsecured on the throttle valve shaft which meshes with 'the' needle valve and stem vert1cally mounted therein so as to be oscillatable, the upper portion of the valve stem being threaded, a spring tending to force said valve stern down to close the valve, a knurled head on the upper end of the valve stem, a segmental plate which screws on the threaded portion of the valve stem above the casing, said plate being provided with an upwardly extending portion, 'a spring-pressed pin in said upwardly extending portion which engages said knurled head and normally locks the two together, a roller mounted in conneetionl with said segmental plate, a plate mounted on the casing and connected thereto at one end and free at the'other end and lowering said hall so as topincline said plate more or less, a throttle valve, an operating lever therefor; and means connected with the throttle valve and lever for oscillating said segmental plate and arranged so that said segmental plate will' travel up on said inn Clined plate as said throttle valve goes to an open position.V e

In Witness whereof, I have hereunto at, fixed my signature in the presence of the witnesses herein named.

l FRANK H. HEITGER.

Witnesses:

O. M. MCLAUGHLDT, G. H. BOINK. 

